// Locate symbols which may execute code outside of scanning range
var lvalues = get_lvalues(candidate);
if (lhs instanceof AST_SymbolRef) lvalues[lhs.name] = false;
+ var one_off = lhs instanceof AST_Symbol && lhs.definition().references.length == 1;
var side_effects = value_has_side_effects(candidate);
var hit = candidate.name instanceof AST_SymbolFunarg;
var abort = false, replaced = false;
|| side_effects && !references_in_scope(node.definition()))
|| (sym = lhs_or_def(node))
&& (sym instanceof AST_PropAccess || sym.name in lvalues)
- || parent instanceof AST_Binary && lazy_op(parent.operator)
- || parent instanceof AST_Case
- || parent instanceof AST_Conditional
- || parent instanceof AST_For
- || parent instanceof AST_If) {
+ || (side_effects || !one_off)
+ && (parent instanceof AST_Binary && lazy_op(parent.operator)
+ || parent instanceof AST_Case
+ || parent instanceof AST_Conditional
+ || parent instanceof AST_If)) {
if (!(node instanceof AST_Scope)) descend(node, tt);
abort = true;
return node;
}
expect_stdout: "PASS"
}
+
+pure_getters_chain: {
+ options = {
+ collapse_vars: true,
+ pure_getters: true,
+ }
+ input: {
+ function o(t, r) {
+ var a = t[1], s = t[2], o = t[3], i = t[5];
+ return a <= 23 && s <= 59 && o <= 59 && (!r || i);
+ }
+ console.log(o([ , 23, 59, 59, , 42], 1));
+ }
+ expect: {
+ function o(t, r) {
+ return t[1] <= 23 && t[2] <= 59 && t[3] <= 59 && (!r || t[5]);
+ }
+ console.log(o([ , 23, 59, 59, , 42], 1));
+ }
+ expect_stdout: "42"
+}
+
+conditional_1: {
+ options = {
+ collapse_vars: true,
+ }
+ input: {
+ function f(a, b) {
+ var c = "";
+ var d = b ? ">" : "<";
+ if (a) c += "=";
+ return c += d;
+ }
+ console.log(f(0, 0), f(0, 1), f(1, 0), f(1, 1));
+ }
+ expect: {
+ function f(a, b) {
+ var c = "";
+ if (a) c += "=";
+ return c += b ? ">" : "<";
+ }
+ console.log(f(0, 0), f(0, 1), f(1, 0), f(1, 1));
+ }
+ expect_stdout: "< > =< =>"
+}
+
+conditional_2: {
+ options = {
+ collapse_vars: true,
+ }
+ input: {
+ function f(a, b) {
+ var c = a + 1, d = a + 2;
+ return b ? c : d;
+ }
+ console.log(f(3, 0), f(4, 1));
+ }
+ expect: {
+ function f(a, b) {
+ return b ? a + 1 : a + 2;
+ }
+ console.log(f(3, 0), f(4, 1));
+ }
+ expect_stdout: "5 5"
+}